Can't download blockchain anymore!!!?

Hi,since the problem I reported here I can't download BC anymore :-( Cause I thought I was mining on a fork, I deleted .ethereum and started to download a fresh BC. But it always stops with following error:

I installed geth on my Ubuntu Box, not for mining but for playing around and getting used to Ethereum.That was 3 - 4 days ago. I read, geth would catch the blockchain on its own, but it didn't do anything so I just kept it running in a terminal.

Today I send 1 Test Ether to my "eth.coinbase" from my Kraken Account, just to verify if it works.30 Minutes later, geth started trying to catch the BC, but fails with Block #1